Home / 6,919.12-10,378.66-1,988.80

Finding the Fourth Proportional to 6,919.12, 10,378.66 and 1,988.80

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Solution

The fourth proportional to 6,919.12, 10,378.66 and 1,988.80 is: 2,983.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,919.12 : 10,378.66 = 1,988.80 : x
  2. Step 2: Convert to fraction form
    6,919.12/10,378.66 = 1,988.80/x
  3. Step 3: Cross multiply
    6,919.12x = 10,378.66 × 1,988.80
  4. Step 4: Simplify right side
    6,919.12x = 20,641,079.01
  5. Step 5: Solve for x
    x = 20,641,079.01/6,919.12
  6. Step 6: Final answer
    x = 2,983.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.